
#div1{
      border:1px solid gray;
      width:1000px;
      height:100%;
      margin:20px auto;
      background:#ccc;
      display: none;
    }
#div2{
    border-radius:5px;
    background: pink;
    width:400px;
    height:400px;
    margin:50px auto;
    }
#btn1{
    background:orangered;
    border-radius:5px;
    width:100px;
    height:60px;
    position:relative;
    }
